117816826 has 4 divisors (see below), whose sum is σ = 176725242. Its totient is φ = 58908412.

The previous prime is 117816823. The next prime is 117816841. The reversal of 117816826 is 628618711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628618711 = 7 ⋅89802673.

It can be written as a sum of positive squares in only one way, i.e., 98903025 + 18913801 = 9945^2 + 4349^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (117816823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29454205 + ... + 29454208.

Almost surely, 2^117816826 is an apocalyptic number.

117816826 is a deficient number, since it is larger than the sum of its proper divisors (58908416).

117816826 is an equidigital number, since it uses as much as digits as its factorization.

117816826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58908415.

The product of its digits is 32256, while the sum is 40.

The square root of 117816826 is about 10854.3459498949. The cubic root of 117816826 is about 490.2328838846.

The spelling of 117816826 in words is "one hundred seventeen million, eight hundred sixteen thousand, eight hundred twenty-six".